Stan Martin's D&G 11"
D&G Optical 11" F15 refractor: FL= 4090. The tailpiece includes a 4" AP focuser on a 6" diameter drawtube providing 14" of travel to allow the use of binoviewers and also 4" eyepieces. Also, the Argo Navis unit is mounted on the tailpiece. The mount is a converted gyroscope testing platform from M.I.T. built by AC Delco weighing about 1/2 ton. It's supported on a 24" diameter concrete pier.All wiring for dew heaters, DSCs, and drives are wired internally through the OTA and pier.